holland



April 28, 1931'- s'r. CLAIR c. HOLLAND 1,803,254

` cHARcoAL BURNER Filed oct. 5, 1929 2 sheets-sheet 1 FIG. I

z .51 56 5S l 54 62 59 INVENTOR@ 54 ATTORNEYS April 28, 1931-. sT. CLAIR c. HOLLAND 1,803,254

CHARCOAL BURNER A K Filed OCb. 5. 1929 2 Sheets-Sheet 2 l BY 7G ATTORNEYS Patented Apr. 28, 1931 ST. CLAR C. HOLLAND, OF l'ONTBEAL, QUEBEC, CANADA., ASSIGNOKR 'IO THE imager tries ROBERT IYIITCHELL COMPANY LEE'ITED, 0F 16.017 TREAL, CANADA.

onancoar. Brianna Application filed Getoner 5, 1929.' Serial No. 397,638.

This invention relates to certain new and useful improvements in charcoal burners of the character disclosed by Allan M. Mitchell in his prior patent application, Serial No.

312,638, filed October 15th, 1928, which hasmatured into Patent No. 1,745,109, Jan. 28,

An object of the invention is to provide a burner in which the fire may be completely extinguished in a relatively brief period of time through the agency of a damper control'- ling both the inliow of combustion supporting air and the outflow `of combustion gases. Another object is to provide a damper which is adjustable to accelerate or retard the progress of combustion within the burner.

A further object is to provide a damper which, in closed position, causes the hre to die out in a comparatively short time-and also prevents .the lire from creeping up into the magazine and consuming the fuel therein. A further object is to provide an improved baile arrangement functioning to force practically all of the inflowing air to the bottomA of the burner and beneath the re pot.

A still further object is to provide an air directing balile arranged between the fire pot and the air admission openings and equipped with a spark intercepting flange serving to prevent the passage of sparks outwardly through said openings.

Still a further object. is to provide alighti ing tray mounted to slide from a position beneath the grate to an accessiblev position adjacent the fire door opening.

Other objects, as well as the advantages and novel characteristics of the invention, will be readily understood from the Afollowing dez; tailed description taken in connection with the accompanying drawings, in which: f

Figure 1 is a view, partly in side elevation,

and partly in vertical section, ofa burner con-y structed in accordance with my invention.

Figure 2 is a transverse sectional view taken f .s on the line 2 2, Figure 1.

Figure 3 is a fragmentary view in side 'elevation, showing the mounting of a damper.

Figure 4 is a fragmentary transverse sectional view taken along the line 4 4 of Figure 3.

' I Figure 5 is a fragmentary transverse sectional view talren along the line 5 5, Figure 3. y

Figure 6 is a longitudinal sectional view of the lighting tray and supporting means therefor.

Figure 7 is a transverse sectionalr view taken along the line 7 7, Figure 6.Y

lThe cylindrical outer casing or shell of the burner is indicatedat 12. A top plate` 13 closes the upper end of the shell and is provided with a central openingV 14 through which fuel is inserted in the fuel magazine 15. Opening 14 is closed byan airtight cover 1G, held in place ink any suitable manner.

The bottom of fuel magazine 15 isformed bya hopper 17 having a central opening 18 through which the fuel passes into a fuel tube 19. The lower end of tube 19 is secured toa. centrally apertured cone 20, forming the top of a lire pot 21. Suitable brackets 20.i are provided for supporting the cone v20 from, and in spaced relation to, the shell 12. The conical grate 22 of the lire pot isk supended from cone 2O by bolts 23 passing through lugs 24 and the flange 25. The annular wall 26 Aof the lire pot is clamped between cone 20 and flange 25. Both cone 2O and the annular wall 26 are provided with apertures 27 The lower end of shell 12 is'closed by a plate 28 which is preferablyV made of asbestos to protect the ioor surface on which the burner is mounted. A false' bottom in the nature of a metal plate 29 is'arranged upon the lplate 28 and is supported from the latter by any suitable formV of supporting members 30. The plate 29 forms the bottom wall of the ash space 31 and isalso utilized to support *the lightingv tray structure hereinafter referred to.- Access to space 31 is afforded by adoorway 32 controlled by any suitable Vform of sliding' door33 httcd between guides 34; The lighting tray 35 is slidably mounted beneath the'grate V22. The details of the mounting or supporting means for the tray are shown to advantage in Figures 1, 6 and 7. Said Vmounting or supporting means comprises' an outer inverted U-shaped member which presents a horizontal top plate 37 and dependent parallel side members 38. The

' lower edges of -side members 38 are turned outwardly tok provide supporting feet 39, which, as illustrated in Figure 1, rest on and are suitably secured to the aforesaid plate 29. Nested within the outer member 86 is an inner member of similar-shape. Member 40 presents atop plate 41 spaced from the top plate 37 and dependent side members 42 engaging the inner surfaces of side membersV 38 and riveted or otherwise securedthereto. rlhe space reserved between plates 41 and 37'- provides a guide channel slidab'ly receiving the shank 43 of the lightino` tray 35. rhis shank' is provided with a depending stop lug 45 operating in a longitudinal slot 46 formed in plate 41. The end walls of the-slot co-operate with the stop lug to limit the sliding movement of the tray. The tray is normally positioned directly beneath the grate 22, but, for

refilling purposes, may be pulled outwardly to an accessible position in close proximity to thelire door opening 32.

In order to provide for the inflow ofthe necessary combustion-supporting air and the outflow of gases, or vproducts ofcombustion, the shell 12 is provided at one side with a plurality of openings 48. These openings are controlled by a damper structure comprising a baseplate 49 and arotatable damper plate 50,bothofwhich are of circular form. YThe base plate 49y is bolted, Vor otherwise firmly secured Yto the shell, and is provided with a plurality of openings 51 registering with the shell openings 48. An asbestos gasket is preferably interposed between Vbase plate 49 and shell 12, as indicated at 52. f

Damper plate is4 rotatably secured to base plate 49 by a central pivot pin 54, affording a horizontal axis about which the damper plate may vbeturned to various, positions of Y adpi-stment. Spaced openings 55 formed m thedamper plate 50, are adapted to belmove'd into and out'of registration with the openings 51. The central portion of damper 50 is provided with an outwardly projecting collar 56 in whichv is arranged-a coil vspring 57 encircling the outer portion of pivot pin 54. This spring is held in compression between the outer surfacesof damper platei() and a thrust washer 58 carried by the outer end 'of pivot 54l and engagingthe Vhead 54a of said pivot. By reason of the spring pressure thus created, damper plate 50 is held in such frictional contact with base plate 49 astfo maintain any position to which it is adjusted.

`The damper mechanism hereinbefore described affords a novel means of control as applied tocharcoal burners. When the maximum degree of draft is desired, the openings 55 are brought into full registration with openings 51, thus accelerating combustion within the burner to the maximum degree.

When it is desired. to regulate or reta-rd the progress of combustion, this is Vaccomplished by rotating the damper plate so that the .solid portions 59 -separating the openings 55 are positioned to partially cover or throttle the yopenings 51 to the desired extent. VThen the ydamperplate 50is shifted to a position where the solid portions 59 fully cover the openings 5l, the inflow ofcombustion supporting air andk the outflow of gases is completely arrested, with the result that the fire in the burner is caused to die out in a comparatively brief period of time. Complete closure of the damper also prevents the fire from creeping up into the magazine and consuming the fuel therein.

ln order to limit the turning movement of the damper plate 50, in either direction, I may provide said plate with Va stop pin 50b cooperating lwith suitable stops 49a carried by the. base plate 49.

Improved baille means are also provided for directing practically all of the incoming air to the bottom of the burner and beneath grate 22. Said baffle means comprises a body plate 61 which is positioned as shown in Figure 1, wherein it will be noted that the upper end of the plate is located in a plane coinciding with t ie longitudinal axis of the damper pivot 54, while the Y lower end of said plate projects a short distance below the grate Y22. Plate 61 extends entirely across the burner but-in spaced relation to that portion of the shell A12 in which the openings 4S areformed. Said plate is connected to the shell byY means of side wallsA 62 having suitable attachin lugs 63 riveted or otherwise secured to the shell. vDuring the operation of the burner, practically all of the inflowing combustion-supporting air isdrawn downwardly throughV the comparatively restricted passage 64, bounded by plate 61, side walls 62 and shell 12, and is delivered beneath the grate 22. At its upper end, plate 61 is provided with a horizontal flange 65 bridging the space reserved between said platev and the upper end of the fuel tube 19. Flange 65 is made long enough to extend' entirely across lll) the burner and the terminals of the flange are the space 67 before finding an outlet through the upper damper openings 46. Tlieplate *61 and flange 65 are. so positioned with reference to the fire pot and the openings 48 as to serve as a spark intercepting means for reventino the direct `aassao'e of s arlrs outz: l a

Awardly through said openings.

. Having thusfully described what I now consider to be the preferred embodiment of my invention, it will be understood that various changes in the construction, combination and arrangement of parts, may be resorted to, within the scope and spirit of the invention, as defined by the appended claims.

Having thus described my invention, what I claim is:

l. A magazine burner of the character described, including means for shutting off the inflow of combustion supporting air and the outflow of combustion gases, whereby the lire in the burner is caused to die out quickly and is prevented from creeping into the maga-- zine and consuming the fuel therein, said means including a single movable damper element controlling both the air inflow and the gas outflow openings.

2. A burner of thecharacterdescribed, comprising a shell provided with a plurality of closely grouped air inflow and gas outliow openings, a singlemovable damper plate provided with openings sliiftable into and out of registration with the shell openings and means for holding the damper plate in various positions of adjustment with respect to said shell openings.

3. A burner of the character described, comprising an outer shell, a fuel magazine located in the upper portion of said shell, a

lire pot positioned below the magazine and( communicating therewith, said shell being formed with a pluralit-y of closely grouped air inflow and gas outliow openings establishing communication between the atmosphere and an air space within the shell surrounding the lire pot and the lower portion of the fuel magazine, a damper plate controlling said openings, and a baflie arranged to direct the iniiowing air to the bottom of the heater and beneath the lirepot.

4. A burner of the character described, comprising a shell having a group of openings formed in a restricted area thereof to provide for the inflow of combustion supporting air and the outflow of` combustion gases, and means operable to partially or completely close all of said openings so as to regulate or completely shut off the flow of air and gases therethrough.

5. A burner of the character described, comprising a shell, a magazine in the upper portion of said shell, a fire pot in the lower portion of the shell arranged to receive fuel from the magazine, said shell being provided in one side with a plurality of closely -grouped openings for the inflow 0f combustion supporting air and the outflow of combustion gases, an adjustable damper plate controlling all of said openings, and a baflie plate arranged in the shell toform a restricted air, passage leading downwardly from a pointdirectly opposite said openings to a point adjacent the bottom of the burner.

6. A burner as recited in claim 5, in which the baffle is provided with a flange arranged to extend across the burner in such a manner i as to-prevent the passage of sparks outwardly through the aforesaid openings.

7. A burner of the character described,

comprising a shell having a magazine in the upper portion thereof, a fire pot arranged in the lower portion of the shell to receive I'uel from said magazine, the upper portion of said shell being provided at one side with a plurality of closely grouped openings for the inflow of combustion supporting airand the outiow of combustion gases, and a baffle structure arranged in the shell in such relation to the fire pot and to the said openings as to cause practically all of the inflowng combustion supporting air to be directed to the bottom of the burner and beneath the lire pot, said 'bali'ie structure including provision for preventing passage of sparks outwardly through the aforesaid openings.

8. Ay burner of the character described,

comprising a shell, a magazine in the vupper portion of said shell, a lire pot in the lower portion of the shell, means for conducting fuel from the magazine to the lire pot, a base plate secured to one side of said shell and provided with a plurality of spaced openings registering with corresponding openings formed in the shell, a damper rotatably secured to said base plate and provided with openings movable into and out of registration l with the aforesaid openings in the base plate, and means for holding said damper plate in various positions of adjustment with respect to the base plate.

9. A charcoal burner of the magazine type,

provided with a single group of openings for y the inflow of combustion supporting air and the outflow 0f combustion gases, Vadjustable damper mechanism controlling said openings and a restricted air passage leading from a point Opposite said openings to a pointbelow the burner grate.

l0. A burner of the character described,

comprising an outer shell, a fuel ma azine located in ythe upper portion of said s ell, a

fire pot positioned below the magazine and communicating therewith, a restricted draft passage extending from a point below to a p oint considerably above said lire pot, and

damper means carried by said shell in proximity to the .upper end of said draft passage.

l1. A burner of the character described, comprising an outer shell, a fuel magazine located in the upper portion of said shell,a

lire pot positioned below the magazine and communicating therewith, said shell being formed with a plurality of openings at a point above said fire pot, a draft passage extending vertically from a point below the fire pot'to a point opposite certain of said open# ings and damper means for controlling said openings.

In witness whereof, I have hereunto set my hand.

' ST. CLAIR C. HOLLAND. 

